18 percent of x will be equal to 12 percent of y
Answer:
moles are equal to the coefficients infornt of chemical equations knowing the moles can help so much when finding either grams or the volumes
The number is written in scientific notation.
The significant figures are the numbers known precisely plus 1 digit that is uncertain.
When the numbers are expressed in scientific notation all the digits before 10^n are significant.
So, 7 and 8 are significant figures and the answer is that the number of significant figures is 2.
Answer: 2
Answer:
0.3 mol A is combined with 0.8 mol B.
Explanation:
Limiting reagent in a chemical reaction is defined as the reagent that is totally consumed when the chemical reaction is complete.
In the reaction:
A + 2B → 2C+D
For a reaction of 1 mole of A, you need two moles of B. That means for any quantity of A you need twice this quantity in B.
Thus, <em>A is limiting reagent when moles of B are higher than twice moles of A.</em>
* 0.5 mol A is combined with 0.3 mol B. Twice moles of A are 1.0 moles that are higher than 0.3 moles. <em>A is not limitng reagent.</em>
* 0.5 mol A is combined with 0.6 mol B. Twice moles of A are 1.0 moles that are higher than 0.6 moles. <em>A is not limitng reagent.</em>
* 0.2 mol A is combined with 0.3 mol B. Twice moles of A are 0.4 moles that are higher than 0.3 moles. <em>A is not limitng reagent.</em>
* 0.3 mol A is combined with 0.8 mol B. Twice moles of A are 0.6 moles that are lower than 0.8 moles. <em>A IS limitng reagent.</em>
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I hope it helps!